staging: rtl8187se: use netdev_warn instead of printk

This patch fixes this type of checkpatch warnings:

WARNING: Prefer netdev_warn(netdev, ... then dev_warn(dev, ... then
pr_warn(...  to printk(KERN_WARNING ...
Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8187se/ieee80211/ieee80211_tx.c

@@ -341,8 +341,7 @@ int ieee80211_rtl_xmit(struct sk_buff *skb,
 	     !(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)) ||
 	    ((!ieee->softmac_data_hard_start_xmit &&
 	      (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) {
-		printk(KERN_WARNING "%s: No xmit handler.\n",
-		       ieee->dev->name);
+		netdev_warn(ieee->dev, "No xmit handler.\n");
 		goto success;
 	}
 
@@ -350,8 +349,7 @@ int ieee80211_rtl_xmit(struct sk_buff *skb,
 	if (likely(ieee->raw_tx == 0)){
 
 		if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) {
-			printk(KERN_WARNING "%s: skb too small (%d).\n",
-			ieee->dev->name, skb->len);
+			netdev_warn(ieee->dev, "skb too small (%d).\n", skb->len);
 			goto success;
 		}
 
@@ -475,8 +473,7 @@ int ieee80211_rtl_xmit(struct sk_buff *skb,
 		 */
 		txb = ieee80211_alloc_txb(nr_frags, frag_size, GFP_ATOMIC);
 		if (unlikely(!txb)) {
-			printk(KERN_WARNING "%s: Could not allocate TXB\n",
-			ieee->dev->name);
+			netdev_warn(ieee->dev, "Could not allocate TXB\n");
 			goto failed;
 		}
 		txb->encrypted = encrypt;
@@ -555,15 +552,13 @@ int ieee80211_rtl_xmit(struct sk_buff *skb,
 		}
 	} else {
 		if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) {
-			printk(KERN_WARNING "%s: skb too small (%d).\n",
-			ieee->dev->name, skb->len);
+			netdev_warn(ieee->dev, "skb too small (%d).\n", skb->len);
 			goto success;
 		}
 
 		txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC);
 		if (!txb) {
-			printk(KERN_WARNING "%s: Could not allocate TXB\n",
-			ieee->dev->name);
+			netdev_warn(ieee->dev, "Could not allocate TXB\n");
 			goto failed;
 		}